Thin shell structure and processing method thereof
Through thin shell structure design, the combination of inner shell, outer shell and partition, and the use of high-pressure contents to offset external loads, the problem of weight increase caused by excessive thickness of the shell is solved, a lightweight and high-strength structural design is achieved, and the navigation performance and safety of the submarine are improved.
Patent Information
- Application Number
- CN202511041813.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-28
- Publication Date
- 2025-09-26
AI Technical Summary
In the existing technology, the hull structure made of high-strength metal materials causes the hull to be too thick and the weight to increase when the design diving depth is increased, which affects the navigation performance and comprehensive combat capability, and causes serious material consumption.
It adopts a thin shell structure design, including an inner shell, an outer shell and a partition. The inner cavity is filled with high-pressure contents, and the partition divides the inner cavity into multiple unit cavities. The high-pressure contents offset the external load, evenly distribute the stress, and improve the structural stability and safety.
While ensuring structural rigidity, the shell weight is significantly reduced, the compressive strength and torsional rigidity are improved, material consumption is reduced, and structural integrity and safety are enhanced.
Smart Images
Figure CN120698097A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of steel structure design, in particular to a thin shell structure and a processing method thereof. Background Art
[0002] In the existing technology, the mainstream implementation solution for pressure vessels, stainless steel tanks involved in the transportation of dangerous goods, hazardous chemicals, and petrochemical products, as well as the pressure hulls of large and medium-sized military submarines, is to use high-strength metal materials (such as special alloy steels) through welding processes to form single-layer or multi-layer cylindrical shell structures. Taking submarines as an example, in order to cope with the exponentially increasing external pressure loads brought about by increasing depth and ensure that the hull meets the strength requirements at the extreme diving depth and strict fatigue life requirements, the most traditional and widely used technical means is to significantly increase the hull wall thickness.
[0003] However, although this "thick for strength" design method is technically mature, it also brings significant disadvantages in engineering applications: taking submarines as an example, as the design diving depth increases, the wall thickness required for safety needs to be greatly increased, which directly leads to the hull structure being extremely thick and heavy. On the one hand, material consumption is serious, and on the other hand, the huge hull volume and mass require a more powerful propulsion system to drive, resulting in increased navigation resistance and energy consumption, which directly affects the range and endurance. At the same time, the overly thick and heavy hull significantly squeezes the submarine's displacement share, limits the tonnage that can be used for other equipment, and weakens the submarine's comprehensive combat capability. This "sacrificing lightness and economy in exchange for safety strength" model has become one of the important factors restricting the further development of modern high-performance, deep-diving submarines.
[0004] Therefore, providing a shell structure that can significantly reduce the shell mass and has an equal or higher safety margin is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention
[0005] The present invention discloses a thin shell structure and a processing method thereof, so as to solve the above technical problems existing in the related art.
[0006] In order to solve the above problems, the present invention adopts the following technical solutions: In a first aspect, the present application provides a thin shell structure, which includes an inner shell and an outer shell. The outer shell is arranged on the outer periphery of the inner shell and forms an inner cavity between the outer shell and the inner shell, and the inner cavity is used to fill high-pressure contents.
[0007] Furthermore, the thin shell structure further includes a partition, which is connected between the inner shell and the outer shell, and is used to separate the inner cavity into a plurality of unit cavities.
[0008] Optionally, the plurality of partitions are arranged to extend along the axial direction of the inner shell, and the plurality of partitions are distributed along the circumferential direction of the inner shell.
[0009] Optionally, the plurality of partitions are arranged to extend along the circumference of the inner shell, and the plurality of partitions are distributed along the axial direction of the inner shell.
[0010] Optionally, a plurality of partitions are staggered and distributed between the inner shell and the outer shell to form a cage-like structure.
[0011] Furthermore, the inner shell is provided with an injection and pressure interface corresponding to the unit cavity.
[0012] Furthermore, the inner shell is formed by bending and welding an integral plate, or the inner shell includes a plurality of inner shell plate units, and the plurality of inner shell plate units are spliced and connected to form the inner shell.
[0013] Furthermore, the shell is formed by bending and welding an integral plate, or the shell includes a plurality of shell plate units, and the plurality of shell plate units are spliced and connected to form the shell.
[0014] Furthermore, the thin shell structure further includes a sealing end head, which is connected to both ends of the inner shell in the axial direction to seal the inner cavity.
[0015] Furthermore, the sealing end head is an annular integral structural component; and / or the sealing end head includes a plurality of sealing end head units, and the sealing end head units are spliced and connected to form the sealing end head.
[0016] Furthermore, a dimension of the inner cavity in a radial direction of the inner shell is greater than a wall thickness of the inner shell and / or the outer shell.
[0017] In a second aspect, the present application further provides a method for processing the aforementioned thin shell structure, comprising the following steps: S100, preparing an outer shell plate, an inner shell plate, and a partition plate, wherein the outer shell plate is an integral plate, the inner shell plate includes a plurality of inner shell plate units, and the partition plate includes a plurality of partitions; S200, rolling the shell plate into a circle, and welding both ends of the rolled shell plate into a fixed shell; S300, welding the plurality of partitions to the inner wall of the shell; S400, welding the inner shell plate unit to the radial inner end of the partition plate, wherein a plurality of the inner shell plate units are enclosed to form an inner shell, and a plurality of unit cavities separated by the partition plate are formed between the inner shell and the outer shell.
[0018] Furthermore, the processing method of the thin shell structure further includes the following steps: S500 , injecting high-pressure contents into the unit cavity.
[0019] The technical solution adopted by the present invention can achieve the following beneficial effects: The thin shell structure and processing method of the present application have a deformation tendency of collapsing or buckling inward when an external load acts on the outer shell, and the high-pressure contents filled in the inner cavity will exert an outward pressure on the outer shell. This outward internal pressure directly offsets a part of the inward compressive stress generated by the external load, reducing the compressive load that the outer shell itself needs to bear. On the other hand, the outer shell mainly plays the role of constraining the inner cavity. When the outer shell has a slight inward concave deformation tendency, the volume of the inner cavity will be reduced. The reduction in the volume of the inner cavity will sharply increase the pressure of the contents of the inner cavity, and the increased pressure will produce a greater outward thrust, strongly resisting this concave deformation, thereby ensuring the structural stability of the entire thin shell structure. Compared with the traditional thickening design, it can ensure the overall structural stiffness while reducing the burden brought by relying on thickening. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0021] Figure 1 This is one of the structural diagrams of the thin shell structure of an embodiment of the present application; Figure 2 This is one of the cross-sectional schematic diagrams of the thin shell structure of an embodiment of the present application; Figure 3 This is the second structural diagram of the thin shell structure of the embodiment of the present application; Figure 4 This is the second schematic cross-sectional view of the thin shell structure of the embodiment of the present application; Figure 5 This is a schematic diagram of the arrangement of the partitions on the outer shell in an embodiment of the present application.
[0022] In the picture: 100, inner shell; 110, injection and pressure interface; 200, outer shell; 300, inner cavity; 310, unit cavity; 400, partition; 500, sealing end. DETAILED DESCRIPTION
[0023] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.
[0024] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in an order other than that illustrated or described herein, and that the objects distinguished by "first," "second," and the like are generally of the same type, and do not limit the number of objects; for example, the first object can be one or more. In addition, the term "and / or" in the specification and claims refers to at least one of the connected objects, and the character " / " generally indicates that the objects connected are in an "or" relationship.
[0025] The following is combined with Figures 1 to 5 , the thin shell structure and the processing method thereof provided in the embodiment of the present application are described in detail through specific embodiments and their application scenarios.
[0026] See Figure 1 and Figure 2, the embodiment of the present application discloses a thin shell structure, the disclosed thin shell structure can be applied to pressure vessels, tank structures involved in the transportation of dangerous goods, hazardous chemicals, and petrochemical products, or can be applied to the pressure-resistant shells of large and medium-sized military submarines. The present application does not impose specific restrictions on this. Specifically, the disclosed thin shell structure includes an inner shell 100 and an outer shell 200. The outer shell 200 is arranged on the outer periphery of the inner shell 100 and forms an inner cavity 300 with the inner shell 100. For example, the inner shell 100 and the outer shell 200 can both be cylindrical structures. The outer shell 200 is coaxially arranged on the outer periphery of the inner shell 100, and the end of the inner shell 100 can be sealed and connected to the end of the outer shell 200. For example, one of the end of the inner shell 100 and the end of the outer shell 200 can be bent toward the other, and After bending, the inner cavity 300 is sealed by welding, and the inner shell 100 and the outer shell 200 are connected and fixed. Alternatively, the thin shell structure may further include a sealing end head 500 that is independent of the inner shell 100 and the outer shell 200. For example, the sealing end head 500 may be an annular plate-shaped structure. The sealing end head 500 is welded to the inner shell 100 and the outer shell 200 to seal the inner cavity 300, and the inner shell 100 and the outer shell 200 are connected and fixed. In the embodiment of the present application, the inner cavity 300 is used to fill high-pressure contents. For example, an injection and pressure interface 110 may be provided on the inner shell 100, through which the high-pressure contents may be injected into the inner cavity 300 to maintain an internal pressure higher than the ambient pressure in the inner cavity 300. For example, the high-pressure contents may be a compressible fluid, such as a compressed gas or a gas-liquid mixed medium.
[0027] Based on the above technical solution, when the inner cavity 300 is filled with high-pressure contents, the outer shell 200 is in a tensile prestressed state. When an external load acts on the outer shell 200, the outer shell 200 has a deformation tendency of collapsing or buckling inward, and the high-pressure contents filled in the inner cavity 300 will exert an outward pressure on the outer shell 200. This outward internal pressure directly offsets a part of the inward compressive stress generated by the external load, reducing the compressive load that the outer shell 200 itself needs to bear. On the other hand, the outer shell 200 mainly plays the role of constraining the inner cavity 300. When the outer shell 200 produces a slight inward concave deformation tendency, the volume of the inner cavity 300 will be reduced. The reduction in the volume of the inner cavity will sharply increase the pressure of the contents of the inner cavity 300, and the increased pressure will produce a greater outward thrust, strongly resisting this concave deformation, thereby ensuring the structural stability of the entire thin shell structure. Compared with the traditional thickening design, it can ensure the overall structural stiffness while reducing the burden brought by relying on thickening.
[0028] During the research process, the inventors found that the force exerted by the high-pressure contents in the inner cavity 300 on the inner shell 100 and the outer shell 200 is relatively concentrated in certain local areas, which is prone to local stress concentration, thereby causing the thin shell structure to deform. In addition, when damage occurs in a certain part, such as a crack in the inner shell or the outer shell, the high-pressure contents may leak rapidly, causing the pressure of the entire inner cavity to drop sharply, and the structure to quickly lose its bearing capacity, resulting in a rapid decline in the application safety of the thin shell structure.
[0029] Based on this situation, in the embodiments of this application, please refer to Figure 3 、 Figure 4 and Figure 5 The thin shell structure may further include a partition 400, which is connected between the inner shell 100 and the outer shell 200. The partition 400 is used to separate the inner cavity 300 into a plurality of unit cavities 310, each of which is relatively independent, and each of which is filled with the aforementioned high-pressure contents. For example, the number of unit cavities 310 may be 2, 10, 16 or 32, etc. The number of unit cavities 310 may be adaptively adjusted according to the actual application scenario, and this application does not impose any specific restrictions on this. On the one hand, the partition 400 tightly connects the inner shell 100 and the outer shell 200 together to form an organic whole. When subjected to external impact or dynamic loads, the thin shell structure can better transmit and disperse these loads, avoid local structure failure due to excessive vibration or deformation, and improve the integrity and safety of the thin shell structure; on the other hand, based on the separation effect of the partition 400, the stress is more evenly distributed on the entire thin shell structure, and each unit cavity 310 independently bears and transmits part of the pressure, which greatly reduces the risk of excessive local stress and improves the overall strength of the thin shell structure.
[0030] After the partitions divide the inner cavity 300 into multiple unit cavities 310, even if a unit cavity 310 is damaged, the high-pressure contents will only leak within that unit cavity 310, while the other unit cavities 310 will still maintain a higher pressure, continuing to provide strength support for the thin shell structure. It is understood that each unit cavity 310 can be individually connected to a device such as a pressure sensor to monitor the pressure changes of the high-pressure contents within the unit cavity in real time. By analyzing the pressure data, it is possible to promptly detect any abnormalities such as leakage or damage in the structure.
[0031] At the same time, when the inner cavity 300 is filled with high-pressure contents, the outer shell 200 is in a tensile prestressed state, and the partition 400 is connected between the inner shell 100 and the outer shell 200. The partition 400 can act as a tensioning rod, that is, the outer shell 200 can generate a certain pulling force on the inner shell 100 through the partition 400 to prevent the inner shell 100 from collapsing.
[0032] In some embodiments of this application, please continue to refer to Figure 5The partition 400 can be in the shape of a flat plate, and multiple partitions 400 are arranged to extend axially along the inner shell 100, and multiple partitions 400 are distributed circumferentially along the inner shell 100. In this way, the inner cavity 300 is divided into multiple unit cavities 310 distributed circumferentially along the inner shell 100. The circumferentially distributed partitions 400 form a structure similar to annular reinforcement ribs, which can effectively resist the action of torque. When the structure is subjected to a torsional load, the partition 400 will prevent relative torsion between the inner shell 100 and the outer shell 200, and evenly distribute the torque on the entire thin shell structure, thereby improving the torsional stiffness and stability of the thin shell structure.
[0033] In some embodiments of the present application, the partition 400 can also be extended along the circumference of the inner shell 100, and multiple annular partitions 400 are distributed along the axial direction of the inner shell 100 (not shown in the figure). For example, the partition 400 can be an annular plate surrounding the inner shell 100. In this way, the inner cavity 300 is divided into multiple unit cavities 310 distributed along the axial direction of the inner shell 100. The annular partition 400 continuously surrounds the inner shell 100 in the circumferential direction, forming an overall annular constraint. When the thin shell structure is subjected to external loads, the partition 400 can also prevent relative torsion between the inner shell 100 and the outer shell 200, and evenly distribute the torque on the entire thin shell structure, thereby improving the torsional stiffness and stability of the thin shell structure.
[0034] Of course, in some embodiments of the present application, the partitions 400 can also be distributed in an interlaced manner between the inner shell 100 and the outer shell 200 to form a cage-like structure (not shown in the figure). The partitions in the cage-like structure are interlaced and connected to each other in multiple directions to form a three-dimensional support network, which can effectively resist deformation caused by external impact and improve the structural stability and safety of the entire thin shell structure.
[0035] In the examples of this application, please continue to refer to Figure 3 The inner shell 100 is provided with an injection and pressure interface 110 corresponding to the unit cavity 310. Each unit cavity 310 is equipped with an independent injection and pressure interface. The operator can inject high-pressure contents into the unit cavity 310 through the injection and pressure interface 110. Compared with the method in which the injection and pressure interface 110 is set on the outer shell 200, it can prevent the injection and pressure interface 110 from being damaged by the environment.
[0036] In an embodiment of the present application, the inner shell 100 can be formed by bending and welding an integral plate, or the inner shell 100 can include multiple inner shell plate units, and the multiple inner shell plate units are spliced and connected to form the inner shell 100. The inner shell plate unit can be a flat plate structure or a curved plate structure. The present application does not impose specific restrictions on this. For example, the inner shell plate unit is preferably a curved plate unit, so that the inner shell 100 after splicing has a cylindrical structure.
[0037] In the embodiment of the present application, the outer shell 200 can be formed by bending and welding a single piece of sheet material, or the outer shell 200 can include multiple outer shell plate units, which are spliced and connected to form the outer shell 200. The outer shell plate units can be either flat plate structures or curved plate structures, and this application does not impose specific restrictions on this. For the convenience of subsequent description, this application describes an arrangement in which the partition 400 is arranged along the axial direction of the inner shell 100, and the multiple partitions 400 are distributed along the circumference of the inner shell 100.
[0038] In a preferred embodiment, the outer shell 200 is formed by bending and welding an integral plate, and the inner shell 100 is formed by splicing together a plurality of inner shell plate units. In this way, when manufacturing and forming the thin shell structure, the outer shell 200 structure can be processed and formed first, and then the outer shell 200 structure is used as the basic component, and a plurality of partitions 400 are welded on the inner side of the outer shell 200. Finally, the inner shell plate unit is welded on the radial inner side of the partition 400. The plurality of inner shell plate units are spliced and connected to form the inner shell 100 structure. In this way, this assembly method from the outside to the inside makes the initially formed outer shell 200 have a certain barrier effect, which can ensure the assembly accuracy of the partition 400 and the inner shell plate unit therein.
[0039] In the embodiment of the present application, the thin shell structure further includes a sealing end head 500, which is connected to both axial ends of the inner shell 100 to seal the inner cavity 300. In an optional embodiment, the sealing end head 500 can be an annular sheet structure. After the inner shell 100, the outer shell 200 and the partition 400 are assembled, the sealing end head 500 can be welded to the ends of the inner shell 100 and the outer shell 200 by welding to achieve sealing of the inner cavity 300. In some optional embodiments of the present application, the sealing end head 500 can also be a split structure. Specifically, the sealing end head 500 can include a plurality of sealing end head units. Each sealing end head unit can be welded and fixed to the inner shell 100, the outer shell 200 and two circumferentially adjacent partitions 400 to achieve sealing of the unit cavity 310. The plurality of sealing end head units are circumferentially spliced and connected to form the sealing end head 500.
[0040] In a further technical solution, the dimension of the inner cavity 300 in the radial direction of the inner shell 100 is greater than the wall thickness of the inner shell 100 and / or the outer shell 200. For example, the wall thickness of the inner shell 100 and the outer shell 200 can both be 2 mm, and the dimension of the inner cavity 300 in the radial direction of the inner shell 100 can be 100 mm. In this way, when the entire thin shell structure is subjected to an external load, it is easier to trigger the thin shell bearing effect of the outer shell 100, that is, the external load is mainly evenly borne by the tensile stress of the outer shell 200, thereby improving the compressive strength of the thin shell structure. On the other hand, while ensuring the pressure bearing capacity of the entire thin shell structure, the larger radial dimension of the inner cavity 300 means that the material usage of the inner shell 100 and the outer shell 200 can be relatively reduced, so that the weight of the entire thin shell structure can be significantly reduced. It should be noted that the wall thickness of the inner shell 100 and the wall thickness of the outer shell 200 can be the same or different, and this application does not impose any specific restrictions on this.
[0041] The present application also discloses a method for processing the aforementioned thin shell structure. The disclosed method for processing the thin shell structure includes: S100, preparing an outer shell plate, an inner shell plate, and a partition plate, wherein the outer shell plate is an integral plate, the inner shell plate includes a plurality of inner shell plate units, and the partition plate includes a plurality of partitions 400; S200, rolling the shell plate into a circle, and welding both ends of the rolled shell plate to form the shell 200; S300, welding a plurality of partitions 400 to the inner wall of the housing 200; S400 , welding an inner shell plate unit to the radial inner end of the partition plate 400 , wherein a plurality of inner shell plate units are enclosed to form an inner shell 100 , and a plurality of unit cavities 310 separated by the partition plate 400 are formed between the inner shell 100 and the outer shell 200 .
[0042] In step S100, the outer shell plate, the inner shell plate and the partition plate can all be made of stainless steel plates and can be cut by laser cutting; In step S300, the partition 400 can be set to extend along the axial direction of the outer shell 200, and multiple partitions 400 can be evenly distributed along the circumference of the outer shell 200. For example, there can be 32 partitions 400, and 32 partitions 400 can divide the inner cavity between the inner shell 100 and the outer shell 200 into 32 unit cavities 310.
[0043] In a further technical solution, the method for processing the thin shell structure further includes the following steps: S500 , injecting high-pressure contents into the unit cavity 310 .
[0044] It should be noted that the injection and pressure interface 110 can be formed on the inner shell unit during the blanking process, and high-pressure contents can be injected into the unit cavity 310 through the injection and pressure interface 110 on the inner shell unit.
[0045] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be noted that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.
[0046] The above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A thin shell structure, characterized in that: The invention comprises an inner shell (100) and an outer shell (200), wherein the outer shell (200) is arranged on the outer periphery of the inner shell (100) and forms an inner cavity (300) with the inner shell (100), and the inner cavity (300) is used for filling high-pressure contents.
2. The thin shell structure according to claim 1, characterized in that It also includes a partition (400), the partition (400) being connected between the inner shell (100) and the outer shell (200), and the partition (400) being used to separate the inner cavity (300) into a plurality of unit cavities (310).
3. The thin shell structure according to claim 2, characterized in that: The plurality of partitions (400) are extended along the axial direction of the inner shell (100), and the plurality of partitions (400) are distributed along the circumference of the inner shell (100); And / or, a plurality of the partitions (400) are extended along the circumference of the inner shell (100), and a plurality of the partitions (400) are distributed along the circumference of the inner shell (100); And / or, a plurality of the partitions (400) are staggered and distributed between the inner shell (100) and the outer shell (200) to form a cage-like structure.
4. The thin shell structure according to claim 2, characterized in that: The inner shell (100) is provided with an injection and pressure interface (110) corresponding to the unit cavity (310).
5. The thin shell structure according to any one of claims 1 to 4, characterized in that: The inner shell (100) is formed by bending and welding an integral plate, or the inner shell (100) comprises a plurality of inner shell plate units, and the plurality of inner shell plate units are spliced and connected to form the inner shell (100); And / or, the housing (200) is formed by bending and welding an integral plate, or the housing (200) comprises a plurality of housing plate units, and the plurality of housing plate units are spliced and connected to form the housing (200).
6. The thin shell structure according to any one of claims 1 to 4, characterized in that: It also includes a sealing end head (500), which is connected to both axial ends of the inner shell (100) to seal the inner cavity (300).
7. The thin shell structure according to claim 6, characterized in that The sealing end head (500) is an annular, integral structural component; and / or the sealing end head (500) comprises a plurality of sealing end head units, and the sealing end head units are spliced and connected to form the sealing end head (500).
8. The thin shell structure according to any one of claims 1 to 4, characterized in that: The dimension of the inner cavity (300) in the radial direction of the inner shell (100) is greater than the wall thickness of the inner shell (100) and / or the outer shell (200).
9. A method for processing a thin shell structure according to any one of claims 2 to 8, characterized in that: The steps include: S100, preparing an outer shell plate, an inner shell plate, and a partition plate, wherein the outer shell plate is an integral plate, the inner shell plate includes a plurality of inner shell plate units, and the partition plate includes a plurality of partitions (400); S200, rolling the shell plate into a circle, and welding the two ends of the rolled shell plate into a fixed shape to form a shell (200); S300, welding a plurality of the partitions (400) to the inner wall of the shell (200); S400, welding the inner shell plate unit to the radial inner end of the partition plate (400), enclosing a plurality of the inner shell plate units to form an inner shell (100), and forming a plurality of unit cavities (310) separated by the partition plate between the inner shell (100) and the outer shell (200).
10. The method for processing a thin shell structure according to claim 9, characterized in that: The following steps are also included: S500: injecting high-pressure contents into the unit cavity (310).